From e6d3180d61de7a80413c241ce44f0943e5d2a156 Mon Sep 17 00:00:00 2001
From: JooYoung Seo <19754711+jooyoungseo@users.noreply.github.com>
Date: Sun, 11 Oct 2026 13:53:51 +0000
Subject: [PATCH] Keep dashboard HTML output mistaken for bslib output in its
 card

The dashboard filter lifts a cell's raw HTML output out of its card when
it takes the output for bslib components, and it tested for them with the
Lua pattern `bslib-`. In a Lua pattern `-` is a quantifier, so the pattern
matched any text containing `bsli`, such as the word "subslide" or the
name `bslib` without a hyphen. That output left its card, and a card with
nothing else in it was dropped, title included. The hyphen is now
escaped, so the pattern matches only the literal `bslib-`, the prefix
bslib uses in its classes, ids, attributes and custom elements.

Closes #15023
---
 news/changelog-1.11.md                        |  1 +
 .../filters/quarto-post/dashboard.lua         |  2 +-
 .../docs/smoke-all/2026/10/11/issue-15023.qmd | 44 +++++++++++++++++++
 3 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 tests/docs/smoke-all/2026/10/11/issue-15023.qmd

diff --git a/news/changelog-1.11.md b/news/changelog-1.11.md
index 4944dc36ba8..754f3da5a13 100644
--- a/news/changelog-1.11.md
+++ b/news/changelog-1.11.md
@@ -35,6 +35,7 @@ All changes included in 1.11:
 
 - ([#14818](https://github.com/quarto-dev/quarto-cli/issues/14818)): Fix a dashboard with more than one page going blank when the URL hash does not name a page, such as a footnote link or a cross-reference link.
 - ([#14819](https://github.com/quarto-dev/quarto-cli/issues/14819)): Fix keyboard focus starting inside the page content when a dashboard opens at a page hash, such as `dashboard.html#sales`. Tabbing backward now correctly returns to the page navigation tabs.
+- ([#15023](https://github.com/quarto-dev/quarto-cli/issues/15023)): Fix a dashboard cell's HTML output being moved out of its card when the output contains text such as `bslib` or the word "subslide", and the card being dropped, title included, when the cell shows nothing else. (author: @jooyoungseo)
 
 ### `html`
 
diff --git a/src/resources/filters/quarto-post/dashboard.lua b/src/resources/filters/quarto-post/dashboard.lua
index e5356220eb4..213baedda9d 100644
--- a/src/resources/filters/quarto-post/dashboard.lua
+++ b/src/resources/filters/quarto-post/dashboard.lua
@@ -270,7 +270,7 @@ function render_dashboard()
                   end
 
                   if #childDiv.content == 1 and childDiv.content[1].t == "RawBlock" and childDiv.content[1].format == "html" then
-                    if childDiv.content[1].text:match('bslib-') ~= nil then
+                    if childDiv.content[1].text:match('bslib%-') ~= nil then
                       -- capture any raw blocks that we see
                       bslibRawOutputs:insert(childDiv.content[1])
 
diff --git a/tests/docs/smoke-all/2026/10/11/issue-15023.qmd b/tests/docs/smoke-all/2026/10/11/issue-15023.qmd
new file mode 100644
index 00000000000..37cf1bcab30
--- /dev/null
+++ b/tests/docs/smoke-all/2026/10/11/issue-15023.qmd
@@ -0,0 +1,44 @@
+---
+title: "HTML output mistaken for bslib output (issue #15023)"
+format: dashboard
+_quarto:
+  tests:
+    dashboard:
+      ensureHtmlElements:
+        -
+          - ".card.cell .test-subslide"
+          - ".card.cell .test-name"
+          - ".test-lifted"
+        -
+          - ".card.cell .test-lifted"
+---
+
+Regression test for #15023. The dashboard filter lifts a cell's raw HTML
+output out of its card when it takes the output for bslib components,
+which it detected with the Lua pattern `'bslib-'`. In a Lua pattern `-` is
+a quantifier, so that pattern matched any text containing `bsli`: the word
+"subslide", or the name `bslib` without a hyphen. Such output left its
+card, and a card with nothing else in it was dropped, title and all.
+
+The first two cells hold text like that and must keep their output in
+their card. The third holds a `bslib-` class, as real bslib components do,
+and must still be lifted out of the card. The selectors name `.card.cell`,
+the card built from a cell: when every output is lifted, the dashboard
+wraps what is left of the page, these outputs included, in a card of its
+own, which carries no `.cell` class.
+
+```{python}
+#| title: A word
+from IPython.display import HTML
+HTML('<p class="test-subslide">A subslide of the deck</p>')
+```
+
+```{python}
+#| title: A name without a hyphen
+HTML('<p class="test-name">Cards are built by bslib</p>')
+```
+
+```{python}
+#| title: A bslib component
+HTML('<div class="bslib-mock test-lifted">Component</div>')
+```